Hi, I ran enhanced for loop in .DRL file .Its looping perfectly but after completion of loop its throwing error mentioned as follows: *org.drools.runtime.rule.ConsequenceException: rule: Test Maadiiiiiiiiiiiiiiiii at org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39) at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1101) at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1029) at org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1251) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:737) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:701) at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:218) at com.sample.DroolsTest.main(DroolsTest.java:156) Caused by: java.lang.NullPointerException at com.sample.Rule_Test_Maadiiiiiiiiiiiiiiiii_0.defaultConsequence(Rule_Test_Maadiiiiiiiiiiiiiiiii_0.java:7) at com.sample.Rule_Test_Maadiiiiiiiiiiiiiiiii_0DefaultConsequenceInvoker.evaluate(Rule_Test_Maadiiiiiiiiiiiiiiiii_0DefaultConsequenceInvoker.java:27) at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1091) ... 6 more * -- View this message in context: http://drools.46999.n3.nabble.com/How-handle-exception-thrown-while-loopi... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

Thnks for Replying , Plz give some idea in above issue. -- View this message in context: http://drools.46999.n3.nabble.com/How-handle-exception-thrown-while-loopi... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

Sorry Mike,Laune I am handling 100thousand records for that i am using CSV file and converting those records into objects which i am using for further calculation. According to my requirement i have loop array inside DRL file So i wrote following code in .java * agCsv.setPolCounterList(polCounterList); agCsv.setAgentList(agentListArray); // local block end for policy--------------------------------------- //firing all rules from here------------- ksession.fireAllRules(); //after firing rules destroying session object ksession.dispose(); * after this i am executing following rule DRL file *rule "Loop Test" salience 50 when $a:AgentCSVBean() then for(Integer agentList: $a.getAgentList()) { System.out.println("--sam====="+agentList); } end* Now above loop execute absolutely well but after finishing loop it throws Error -- View this message in context: http://drools.46999.n3.nabble.com/How-handle-exception-thrown-while-loopi... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

Yes Mike, I am getting expected output but after completion of loop it throws error -- View this message in context: http://drools.46999.n3.nabble.com/How-handle-exception-thrown-while-loopi... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

Thnks Laune for ur reply but i tried that condition part even than also its coming up with same error -- View this message in context: http://drools.46999.n3.nabble.com/How-handle-exception-thrown-while-loopi... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

Hi Laune, I do wht u asked me, I added print statement before and after for loop "Before" is getting printed twice and "After" only once.

Error message which i mentioned in catch block from where i called rule in java. in following order message getting printed * before list of data after before error* /im printing 128thousand records/ * No their is no null field in given records................... * -- View this message in context: http://drools.46999.n3.nabble.com/How-handle-exception-thrown-while-loopi... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

HI Laune , I did required changes in code by adding if condition before for loop *System.out.println("Before"); if($a.getAgentList() != null ){ System.out.println("--sameeeeeeeeee====="); } for(Integer agentList: $a.getAgentList()) { System.out.println("-==========-"); if($a.getAgentList() != null ){ System.out.println("--sam====="+agentList); } else{ System.out.println("null"); } } System.out.println("after");* Now Execution order is f*irst "Before" is getting printed thn "Sameeeeeeeee" followed by "=============" *"after" "Before" "errrrrr"** -- View this message in context: http://drools.46999.n3.nabble.com/How-handle-exception-thrown-while-loopi... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users